Hostname: page-component-78c5997874-4rdpn Total loading time: 0 Render date: 2024-11-15T12:14:58.778Z Has data issue: false hasContentIssue false
  • English
  • Français

The pathological effects of sporocysts, rediae and metacercariae on the digestive gland of Bithynia tentaculata (Mollusca: Gastropoda)

Published online by Cambridge University Press:  06 April 2009

Trevor A. J. Reader
Trevor A. J. Reader
Affiliation:
Department of Biological Sciences, Portsmouth Polytechnic, Hay Street, Portsmouth PO1 3QL
Get access Rights & Permissions [Opens in a new window]

Extract

The uninfected digestive gland of Bithynia tentaculata consists of three main cell types: ‘absorptive’ cells, ‘thin’ cells and ‘secretory’ cells. With infection by sporocysts, rediae, or metacercaria, pressure effects caused a reduction in the lumen of the digestive gland tubules and this probably resulted in a starvation autolysis. Some tubules recovered from infection and in such cases there was a reduction in the height of the epithelium. A migration of the digestive gland nuclei was only evident in redial infections and this may have been due to the toxic effects of rediae. In addition, rediae directly ingested host digestive gland tissue.The digestive gland was reduced to about two-thirds of its normal size in all heavily infected snails. Secretory cells of the gland were more resistant to infection than were the absorptive or thin cells.

I am indebted to Dr F. R. Stranack for her supervision and guidance throughout this investigation, and to Dr G. Charles and Dr T. Jenkins for their continued help and advice. This study was carried out during the tenure of a Research Assistantship awarded by the Governors of Portsmouth Polytechnic.

Type
Research Article
Information
Parasitology , Volume 63 , Issue 3 , December 1971 , pp. 483 - 489
Copyright
Copyright © Cambridge University Press 1971

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Agersborg, H. P. (1924). Studies on the effects of parasitism upon tissues. I. With special reference to Gastropod molluscs. Quarterly Journal of Microscopical Science 68, 361–401.Google Scholar
Cheng, T. C. (1963). The effects of Echinoparyphium larvae on the structure of and glycogen deposition in the hepatopancreas of Helisoma trivolvis and glycogenesis in the parasite larvae. Malacologia 1, 291–303.Google Scholar
Cheng, T. C. & Snyder, R. W. Jr. (1962). Studies on host–parasite relationships between larval trematodes and their hosts. I. A review. II. The utilisation of the host's glycogen by the intra molluscan larvae of Glypthelmins pennsylvaniensis Cheng and associated phenomena. Transactions of the American microscopical Society 82, 209–28.CrossRefGoogle Scholar
Creplin, F. C. H. (1825). Observations de entozois. Gryphiswaldiae, 87 pp.Google Scholar
Dubois, G. (1927). Les Cercaires de la Region de Neuehâtel. Societé Neuchâteloise des Sciences Naturelles 53, 1–77.Google Scholar
Hurst, C. T. (1927). Structural and functional changes produced in the gastropod mollusc, Physa occidentalis, in the case of parasitism by the larvae of Echinostoma revolutum. University of California Publications in Zoology 29, 321–404.Google Scholar
James, B. L. (1965). The effects of parasitism by larval Digenea on the digestive gland of the intertidal prosobranch, Littorina saxatilis (Olivi). subsp. tenebrosa (Montagu). Parasitology 55, 93–115.CrossRefGoogle Scholar
James, B. L. & Bowers, E. A. (1967). The effects of parasitism by the daughter sporocyst of Cercaria bucephalopsis haimaena Lacaze-Duthiers, 1854, on the digestive tubules of the cockle Cardium edule L. Parasitology 57, 67–77.CrossRefGoogle Scholar
Kinoti, G. (1967). Studies on some factors affecting the development of Schistosomes in their molluscan hosts. Ph.D. Thesis, University of London.Google Scholar
Lühe, M. (1909). Parasitische Plattwurmer. I. Trematoden. Süsswasser-fauna Deutschlands 17, 1–217.Google Scholar
MacMunn, C. A. (1900). On the gastric gland of Mollusca and Decapod Crustacea: its structure and functions. Philosophical Transactions 193, 1–34.Google Scholar
Neuhaus, W. (1940). Parasitäre kastration bei Bithynia tentaculata. Zeitschrift für Parasitenkunde 12, 65–77.CrossRefGoogle Scholar
Neuhaus, W. (1949). Hungerversuche zur frage der parasitären kastration bei Bithynia tentaculata. Zeitschrift für Parasitenkunde 14, 300–19.CrossRefGoogle Scholar
Pratt, I. & Lindquist, W. D. (1943). The modification of the digestive gland tubules in the snail Stagnicola following parasitization. Journal of Parasitology 29, 176–81.CrossRefGoogle Scholar
Probert, A. J. (1965). Studies on the larval trematodes infecting the freshwater molluscs of Llangorse lake, South Wales. Part II, The Gymnocephalous Cercariae. Journal of Helminthology 39, 53–66.CrossRefGoogle Scholar
Reader, T. A. J. (1970). The biology of larval trematodes in Bithynia tentaculata (Mollusca: Gastropoda). M.Sc. Thesis, University of London.Google Scholar
Rees, G. (1931). Some observations and experiments on the Biology of larval trematodes. Parasitology 23, 428–40.CrossRefGoogle Scholar
Rees, G. (1934). Cercaria patellae Lebour, 1911, and its effects on the digestive gland and gonads of Patella vulgata. Proceedings of the Zoological Society of London 1, 45–53.CrossRefGoogle Scholar
Rees, W. J. (1936). The effect of parasitism by larval trematodes on the tissues of Littorina littorea Linné. Proceedings of the Zoological Society of London 2, 357–68.Google Scholar
Sewell, R. B. S. (1922). Cercariae Indicae. Indian Journal of Medical Research 10 (Suppl.yes), 1–370.Google Scholar
Sumner, A. T. (1965). The cytology and histochemistry of the digestive gland cells of Helix. Quarterly Journal of Microscopical Science, 106, 173–92.Google ScholarPubMed
Thiele, G. (1953). Feinbau und Funktion der Mitteldarmdrilse einheimischer Gastropoden. Zeitschrift für Zell-forschung und microskpie Anatomie 38, 87–138.CrossRefGoogle Scholar
Wright, C. A. (1966). The pathogenesis of helminths in the Mollusca. Helminthological Abstracts 35 (Review article), 207–24.Google Scholar